Appeal No. 1998-0425 Page 26
Application No. 08/272,527
12. The apparatus according to claim 2 further
comprising measuring means for monitoring operation of said
waste treatment apparatus by measuring changes in operating
parameters of the apparatus that indicate dynamic wet pressure
changes across the diffusion elements with sufficient
precision for initiating the flow of cleaning agent with
sufficient frequency for maintaining the dynamic wet pressure
across the diffusion elements in a range not to exceed about
25 inches of water gauge above a base condition of said
elements.
13. The apparatus according to claim 3, 11 or 12 wherein
said measuring means comprises means for measuring pressure
across or flow of gas through one or more diffusion elements.
14. The apparatus according to claim 3, 11 or 12 wherein
said measuring means comprises means for measuring the
pressure across and flow of gas through one or more diffusion
elements.
15. The apparatus according to claim 3, 11 or 12 wherein
said measuring means comprises means for measuring said
changes with sufficient precision to maintain the dynamic wet
pressure across the diffusion elements in a range not to
exceed about 15 inches of water gauge above said base
condition.
16. The apparatus according to claim 3 or 12 wherein
said measuring means comprises means for measuring the
hydrostatic pressure of said liquid at about the elevation of
the diffusion elements, means for measuring gas pressure
within a plenum downstream of a flow-regulating means, and
means for measuring the gas pressure within a header supplying
gas to said flow regulating means.
17. The apparatus according to claim 3, 11 or 12 wherein
said measuring means includes means for measuring the dynamic
wet pressure across one or more of said diffusion elements.
18. The apparatus according to claim 3 wherein said
diffusion elements are divided into at least two groups, said
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